Antenna



FIG. 1 is a top perspective view of an antenna.

FIG. 2 is a top plan view of the antenna of FIG. 1.

FIG. 3 is a front elevation view of the antenna of FIG. 1.

FIG. 4 is a bottom plan view of the antenna of FIG. 1; and,

FIG. 5 is a side elevation view of the antenna of FIG. 1.

The broken line in the figure drawings represents unclaimed environment only and forms no part of the claimed design. 

CLAIM The ornamental design for an antenna, as shown and described. 